RFR: 8335730: JFR: Clean up jdk.jfr

[Markus Grönlund]

On Thu, 4 Jul 2024 21:30:59 GMT, Erik Gahlin <egahlin at openjdk.org> wrote:

> Could I have review of a PR that:
> - remove unused imports
> - remove unused variables in instanceof
> - use constants instead Integer.valueOf(-1) or Long.valueOf(0L)
> - add final modifier where missing
> - prefer package protected classes over public
> - use try-with-resources
> - use Arrays.toString(...) instead of Arrays.asList(...).toString();
> 
> Testing: jdk/jdk/jfr
> 
> Thanks
> Erik

Marked as reviewed by mgronlun (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/20042#pullrequestreview-2160957402